Know why does Android smartphone charging become slow; Check these things
If your smartphone or charger does not support fast charging, then charging can be slow. Make sure that both your device and charger support fast charging.

Even today, the amount of users utilizing Android phones is very high. Even after getting Made in India, the amount of iPhone users is not increasing. You will see Android smartphones in many homes. Many types of problems come after some time with Android phones, one of them is slow charging. Sometimes the charging of Android smartphones becomes slow, after which we are unable to understand how this happened. For this, we often visit service centers and shops.
This is usually because of the weak or faulty power source, wirless charging, or dirt on the charging port. Apart from this, charging can be slow due to using the phone when it's on charge, and leaving the app open in the background, old battery or temperature increased.
Software updates can also sometimes cause charging problems. If the software contains bugs, then these tend to affect the battery. Sometimes, charging is much slower because there is some sort of power problem in the socket or power supply that you are charging from.